Dust-trough and dust-trough cleaner.



D. MOORE.

DUST TROUGH A ND DUST TROUGH CLEANER.

APPLICATION FI'LED MAY I2, 1913.

1,175,285. Patented Mar.14,1916.

(Xi/60165525. Znvantor.

THE COLUMBIA PLAgmanAPH cm. WASHINGTON. n. c.

DAVID MOORE, OF rnn-nniowa.

DUST-TROUGH AND DUST-THOUGH CLEANER.

Specification of Letters Patent.

Patented Mar. 14, 1916.

Application fi led May 12, 1913. Serial No. 767,222.

Iowa, have invented a certain new and useful Dust-Trough and Dust-TroughCleaner, of which the following is a specification.

The object of my invention is to provide a dust trough of simple,durable and inexpensive construction, pr vided with inclined sides, andwith a dust receptacle having a restricted upper opening, A furtherobiect is to provide a dus trough of this kind having a receptacleprovided with openings in its lower side and with adjustable means forclosing said openings and with a swab for cleaning said receptacle andhaving a handle extended through said opening.

My invention consists in certain details, in the construction,combination and arrangementof the various parts of the deshows asectional view of the said dust board and a portion of the wall, takenon the line 2-2 of Fig.1. Fig 3 shows a detail, longitudinal, vertical,sectional view through a portion of my dust trough, and Fig. 4 shows adetail view of my improved swab or cleaning device. 7

In the accompanying drawings, I have used the reference numeral 10 toindicate generally the black board to which my improved dust trough issecured. I preferably provide a board or the like 11 having its upperedge inclined downwardly and away from the black board 10, as clearlyshown in Fig. 2. My improved dust trough is preferably made in sectionsof suitable length. Each section. I preferably make from a. single pieceof sheet metal or the like, bent to form a cylinder 12, having a narrowlongitudinal opening at its upper side and having inclined walls 13 and14:.

extending upwardly and away from said opening. as clearly shown in Fig.2. The wall 13 is designed to rest upon the inclined upper surface ofthe board'll, and to be secured thereto in any suitable manner. Theouter edge of the wall 14 is preferably bent or curved into a smallcylinder 15'. Suitable brackets 16 may be placed at regular intervalsand secured to the wall 14: and board 11 by means or" screws or thelike.

.It will be seen that the walls 13 and 1e form av trough for supportingerasers and crayon. The opening in the upper side of the cylinder 12 issufliciently narrowrto prevent the crayon from dropping downwardly intosaid cylinder. One end of each section of my improved dust trough ispreferably somewhat contracted and the other end. is preferably somewhatenlarged so that the adiacentends of succeeding sections may betelescoped. as shown in Fig. 1.

In the bottom of the receptacle formed by the cylinder 12 I provide, atcertain inter vals, openings 17. Mounted on the cylinder 12 are slidingcovers 18 designed in one position of their movement to cover therespective openings 17. Each of the covers 18 is provided with adownwardly extending flange 19 for conveniently sliding the covers.Received within the cylinder 12 is a swab or cleaning device 20, havinga handle 21 which extends upwardly through the opening in the upper sideof said cylinder, and has at its upper end an enlarged portion 22 whichmay be'too large to pass through said opening.

In the practical use of my improved dust board, the dust will gradually*drift down the inclined walls 13 and 14 and drop into the cylinder 12.The narrow opening at the upper side of sa d cylinder prevents theentrance of crayon or erasers. which do not lie in a trough full ofdust. lVhen the caretaker desires to clean the dust trough, the

dust is all brushed into the cylinder 12. The upper opening 17 isuncovered by moving the slide 18 and the swab 20 is moved along the dusttrough until the dust is discharged through the opening 17 I preferablyprovide end walls 23, of suitable construction for closing the ends ofmy trough.

Where my improved dust trough is used, the dust collects in the cylinder16 and will not be readily blown about the room to soilclothing and bein the air breathed by the occupants. It is, therefore, far cleaner andmore sanitary than the ordinary dust, crayon and eraser trough. At thesame time my trough may be more quickly and easily cleaned than theordinary trough and this can be done with a minimum disturbance of thedust in the trough. A pail can be held under the discharge opening 17and very little dust will fly about the room.

It will be understood that changes maybe made in the details of theconstruction of my dust trough and it is my intention to cover by thisapplication any variations in construction which may be included Withinthe scope of the following claim.

I claim as my invention:

In a dust trough and cleaner, the combination of a plurality of dusttroughs having a cylinder formed with a narrow, longitudinal opening inits upper side, and having a portion extending upwardly and rearwardlyfrom said opening and a portion extending upwardly and forwardly fromthe opposite side of the opening, said dust troughs being larger at oneend than the other to permit them to telescope, the cylindrical portionsof said dust trough being provided with openings in their sides, covermembers curved to form more than a half.

cylinder slidably mounted on said cylindrical portions and havingdownwardly ex tending handle members on said cylindrical portions, and aswab having a cleaning portlon received within sald cylinder of a sizetoo large to pass through said longitudinal opening, and having a handleextending from. the opening, and. an enlarged portion on theouter end ofthe handle to prevent the handle from dropping into the cylinder.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

